Check out the companies making headlines in postmarket trading: Reddit — The social media platform slid 17% after Reddit’s user numbers fell short of Wall Street’s expectations. Daily active uniques averaged 101.7 million for the fourth quarter, reflecting growth of 39% year over year but missing analysts’ call for 103.1 million, per StreetAccount. Separately, Reddit beat analysts’ expectations on the top and bottom lines for the fourth quarter. The Trade Desk — The advertising technology stock plunged 25% after posting revenue of $741 million in the fourth quarter, which was below the consensus forecast of $759 million from analysts polled by LSEG. Guidance for current-quarter revenue was also weak. On the other hand, the company earned 59 cents per share, excluding items, beating the Street’s estimate by 3 cents a share. Robinhood — The digital finance platform jumped 13% on stronger-than-expected revenue for the fourth quarter. Robinhood reported $1.01 billion for the three-month period, topping the consensus estimate of $944.6 million from analysts surveyed by LSEG. AppLovin — The app technology stock surged 20% after beating Wall Street’s predictions for the fourth quarter and offering strong current-quarter revenue guidance. AppLovin earned $1.73 per share on $1.37 billion in revenue, while analysts polled by LSEG had penciled in $1.24 in earnings per share and $1.26 billion in revenue. Dutch Bros — The coffee shop chain soared 19% after fourth-quarter earnings surpassed expectations and after issuing an optimistic full-year revenue outlook. Dutch Bros earned 7 cents per share, excluding items, and recorded $343 million in revenue. Analysts had expected the Oregon-based company to see just 2 cents earned for each share and $318 million in revenue. Fastly — The cloud platform provider tumbled about 16% after it offered weak guidance for the full year. Fastly sees a loss of 9 cents to 15 cents per share for the period, while analysts polled by LSEG anticipated a profit of 4 cents per share. The company also posted a loss of 3 cents per share for the fourth quarter, wider than analysts’ consensus estimate. MGM Resorts — The resort and casino operator popped 8% after posting $4.35 billion in revenue for the fourth quarter. That is better than the consensus estimate of $4.27 billion, per LSEG. Equinix — The data center stock shed 2%. While Equinix raised its quarterly cash dividend by 10% to $4.69 per share, the company offered a softer full-year revenue outlook than anticipated by analysts, according to LSEG. — CNBC’s Darla Mercado contributed reporting.